Stamp-mill



(No Model.) 2 Sheets-Sheet 1l.

W. A. LGGUB.

STAMP MILL.

1Y0-558,190. Patented Apr. 14, 1896.`

(No Model.) 2 Sheets-Sheet 2.

W. AfLoGUE. STAMP MILL.

No. 558,190. Patented Apr. 14, 1896.

" In m2722202 ANDREW BLHAHAM. PMUTGUYHQWASWNGION, DE.

I signed to receive the ore to be crushed.

UNITED STATES ATFNT OFFICE.

' WILLIAM 'ALFRED LoeUF, oF sUNsFnlvIoNTANA.

STAlVlP-MILL.

SPECIFICATION forming part of Letters Patent No. 558,190, dated April 14, 1896, Application filed May 27, 1895. 4Serial No. 550,830. (No model.)

To all whom t may concern: n

Be it known that I, WILLIAM ALFRED LOGUE, a citizen of the United States, residing at Sunset, in the county of Deer Lodge and State of Montana, have invented certain new and useful Improvements in Stamp -Millsg and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to improvements iii mills designed more particularly for the comminution of ores containing preciousmetals g and its novelty will be fully understood from the following description and claims, when taken in connection with the annexed drawings, in which- Figure 1 is an end view of my improved mill with parts removed. Fig. 2 is a vertical longitudinal section taken in the plane indicated by the line y y of Fig. l. Fig. 3 is a vertical transverse section of the mill. Fig. 4 is a side View with parts in section. Figs. 5 and 6 are detail views of small cylinders, having one and two cams, respectively, for a purpose presently described; Y and Fig. 7 is a detail side elevation of the device for concentrating the discharge of the water and com- Ininuted ore.

In the said drawings similar numerals indicate corresponding parts in all of the views, referring to which- I 1 indicates the main frame of' my improved mill, which may be constructed as illustrated or in any other approved manner, and 2 indicates the revoluble cylinder, which is decylinder 2 comprises the peripheral wall 3, formed of sheet metal or other suitable material, and the end walls or heads `4., to which the peripheral wall is connected by bolts 5, as better shown in Fig. 4. The said end walls or heads 4L are provided with central openings surrounded by circular flanges 6, in which openings are arranged circular screens 7, which also have lateral flanges S at their inner edges, as shown, and in'ordcr that access may be readily gained to the interior of the cylinder when desired I prefer to form each headl. in two sections, which are held together by the bolts 5 and by connecting-plates 9, bolted to the flanges 6, and l also prefer to Thi s'V form the screens 8. in two sections, which are held together by the connection of the sections to the head-sections and by plates 10, bolted to the flanges 8, as illustrated. By reason of this construction it will be perceived that part of each headv 4. may be removed, when it is desired to gain access to the interior of the cylinder, Without disturbing the other part, which is a desideratum.

The cylinder 2 is mounted upon three (more or less) pairs of antifrictionfrollers 11 and bcneath two (more or less) pairs of similar rollers 12 and is provided with peripheral ribs 13, designed to engage the inner sides of rollers 11 12 and prevent lateral movement of the cylinder,` and is also provided with peripheral gear-teeth 14. for the engagement of the pinion l5, through the medium of which the cylinder is preferably revolved, although other suitable gearing for transmitting motion to the cylinder may be employed, if desired.

16 indicates stationary cores of suitable material which are arranged Within the flanges S of the screens 7 and are provided with suitable packing-rings 17 to prevent leakage between them and said flanges when the mill is in operation. These cores 16 are supported and held against rotation 4by the iixed shaft 1S, which is connected to the frame l, and `they are designed for the connection of the feedshoppers 19 (better illustrated in Figs. 2 and 4) and are also designed to support the water-feed pipe 20, which extends 'transversely through them and the cylinder and which is provided within the cylinder with a plurality of dischargeapertures, as shown 1in Fig. 2, designed to spray Water upon the contents of the cylinder.

21 indicates three (more or less) mullers and stamps which are arranged within the cylinder 2 and are connected by chains 22 with the shaft 18, which holds them against material circular movement, and 23 indicates cam-shoes which are designed to raise the muller-stamps as the cylinder revolves and allow the same to drop suddenly with crushing force on the ore in the bottoni of the cylinder. There are three series of four camshoes each illustrated, each series being designed to cause its respective stamp-muller V2i to rise and fall four times per each revolution of the cylinder. Then the cylinders -IOO 2 are small and are to be revolved at a high rate of speed, a single cam-shoe 23, (see Fig. 5,) extending the full width of the cylinder, may be employed in conjunction with a single muller-stamp, or, when desired, two camshoes 23D (see Fig. 6) may be employed in conjunction with a single muller-stamp.

The cam-shoes 23 are preferably provided at the time of manufacture with threaded studs 24, and these studs are passed through the peripheral wall 3 of the cylinder 2 and are provided with nuts 25, which serve to securely hold the cam-shoes in position in the cylinder and yet permit of any one or all of the said cam-shoes being readily removed when they are worn or broken. When desired, however, the cam-shoes maybe formed integral with the periphery of the cylinder, as shown in Figs. 5 and 6. As better shown in Fig. 2 of the drawings, the upper sides of the stamp-mullers are channeled in the direction of their length, as indicated by 25C. These channels are provided in order to enable the comrninuted material, which during the operation of the mill collects back of the stampanullers, to wash over the same and fall in front of them in a position to be a comminuted state, the combination of a revcrushed by said stamp-mullers on the succeeding fall of the same.

I term the elements 21 of my improved mill stamp-mullers because in practice they serve the function of a stamp and that of a 1nuller'-that is to say, when the cylinder is rotated the cam-shoes moving beneath the parts 21 will enable the parts 2l to operate similar to a muller and grind the ore, while when the said elements 21 are raised and suddenly let fall they will operate in a manner similar to a stamp and crush the ore.

30 indicates receptacles which are arranged so as to receive the water and comminuted ore as it is discharged between the flanges 6 8 of the cylinder and are designed to be connected with amalgamating apparatus, (not ill-ustrated,) and 31 indicates detlecting devices, one of which is employed on each side of the cylinder, which are designed and adapted to prevent the water while between the flanges 6 8 from taking a circular course and being thrown in the form of spray from the cylinder and are calculated to stop the water, so that it will flow in concentrated streams into the receptacles 30. These devices 31, as better illustrated in Figs. 1, 4, and 7, respectively, comprise a shank designed to be connected to one ofthe cores 16, and a blade which is designed to rest between the ilanges G 8 and extend at right angles to the direction of movement of the cylinder, and is provided on its lower side with a packingstrip engaging the flange 6, so as to prevent the escape of water beneath the blade.

In the practical operation of my improved milling-machine the cylinder 2 is set in motion, and water is fed into the same through the pipe 20, and ore is fed through the hoppers 19. This mingled ore and water will by virtue of gravity assume a position in the bottom of the cylinder where the ore will be subjected to the action of the muller-stamps and will be quickly reduced to a comminuted state. When thus reduced, the comminuted ore will flow with the water through the screens 7 into the receptacles 30 and will be conveyed therefrom to an amalgamating apparatus for the purpose of amalgamation. The ore, when struck by the falling mullerstamps 21, will, by reason of the construction of the cylinder, always be such a distance below the screens 7 that there will be no likelihood of it being thrown against the screens with sufficient force to break the same.

In practice the cylinder might be provided with but one discharge and with but a single feed-hopper5 but I generally prefer, for obvious reasons, to provide it with two feed-hoppers and two discharges, as illustrated.

IIavin g described my invention, what I claim is- 1. In a mill `for reducing ore and the like to oluble cylinder having a head at one end provided with a circular screen and with lateral, outwardly-extending, circular iianges G, S,

arranged on opposite sides of the screen, a stationary core arranged within the lian ge S,

` means within the cylinder for reducing the ore to a comminuted state, and a stationary deflecting device comprising a shank con- Y nected to the stationary core and a blade arranged between the iianges G, 8, and extending at right angles to the direction of movement of the cylinder, substantially as specified.

2. In a mill for reducing ore and the like to a iinely-divided state, the combination of a main frame, antifriction-rollers 12, 13, carried by said frame, a revoluble cylinder arranged between the antifriction-rollers, a cam-shoe connected to the inside of the periphery oi' the cylinder, a stamp-muller, stationary cores arranged at opposite ends of the cylinder, circular screens surrounding said cores, a waterpipe extending through the cores and having a discharge within the cylinder, feed-hoppers extending through the cores, a fixed rod extending through the cores, a chain connecting the stamp-muller with said rod and a suitable means for revolving the cylinder, substantially as specified.

In testimony whereof I affix my signature in presence of two witnesses.

WILLIAM ALFRED LOGUE.

lVitnesses:

VILLIAM A. DEAN, W. J. FLEMING.

IOO 

